I purchased a twongo ad for air duct cleaning. As soon as I called to schedule the cleaning, Mike started adding on expenses that were not listed in the ad. When I questioned those expenses, he got defensive and rude. I still scheduled the cleaning, but when he got there, he said that we had an entire additional system in our house, and that 1 additional system was going to cost the same as the 2 systems I purchased combined!! That would double my cost! When I again asked him to clarify why we had an additional system (seeing as how we only have 2 thermostats and 2 heaters and 2 air conditioners), he got rude and defensive. He actually yelled at me and then hung up on me in the middle of the conversation. I couldn't get a word in edgewise because he was so busy yelling at me and interrupting me! It is pretty much the WORST customer service that I have ever had from another person. I was able to get a refund for my purchase, but I would never do business with him again, and I would recommend that others avoid his business as well.